In Kerbal Space Program for PC, PS4 and etc., the player is given a relatively complex task of developing their own space program from a scratch. Thus, at the beginning, the player is required to build a spacecraft using many different parts. Each of them serves a specific purpose and affects the ship in flight. The spaceship is supposed to reach the Earth's orbit with a crew onboard, and then travel to one of the two moons of planet Kerbin, for example. The mission ends with an exceptionally difficult landing.

In the main, open game mode, the player is free to experiment with their spacecraft's settings. However, the game features also a set of story missions, which collectively build up a campaign (once the game was released, those elements became available). In this mode, the player hires and trains astronauts, conducts research, builds space stations, as well as bases and visits dozens of planets and moons.

Minimal requirements::

Processor: Intel Core 2 Duo
RAM: 4 GB RAM
Graphics: GeForce 8800 
Disk space: 4GB

Source: https://www.gamepressure.com/